However, the following operations should be carried out after the sludge sample has been poured into the cell:

with the purge valve removed the piston should be pushed down until it skims the surface of the sludge;

re-insert the purge valve and tighten it down;

follow the test procedure until the vertical asymptote of the curve is reached.

In practice, the filtration should be interrupted when the slope of the tangential at the point of interest is 5 times greater than the slope for the initial linear section. Determine the filter cake dry solids content at the pressure selected (at 105°C ± 2°C, until a constant weight is obtained).

SUEZ's degremont® water handbook offers to water treatment professionals, fundamental concepts of water treatment processes and technologies as well as degremont® solutions applied to treatment line and adapted to each use of water.Designed by field men for field men, this valuable tool is essential for site managers, environmental managers, quality managers, maintenance managers, stakeholders in sustainable development, water agencies, documentation centers in universities, consultants, local authority technical departments, water management companies, etc.

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